private void grantAllAvailable()
{
while (q.Count != 0 && counter >= q.First.Value.units)
{
SyncUtils.Pulse(mon, q.First.Value.condition);
counter -= q.First.Value.units;
q.First.Value.ready = true;
q.RemoveFirst();
}
}
public bool Acquire(int units, int timeout)
{
Monitor.Enter(mon);
try
{
if (q.Count == 0 && counter >= units)
{
counter -= units;
return(true);
}
if (!TimeoutInstant.ShouldWait(timeout))
{
return(false);
}
var node = q.AddLast(new Request(units));
var toi = new TimeoutInstant(timeout);
while (true)
{
try
{
SyncUtils.Wait(mon, node.Value.condition, toi.Remaining);
}
catch (ThreadInterruptedException)
{
if (node.Value.ready)
{
Thread.CurrentThread.Interrupt();
return(true);
}
q.Remove(node);
grantAllAvailable();
throw;
}
if (node.Value.ready)
{
return(true);
}
if (toi.IsTimeout)
{
q.Remove(node);
grantAllAvailable();
return(false);
}
}
}
finally
{
Monitor.Exit(mon);
}
}
public void Release(int units)
{
bool wasInterrupted;
SyncUtils.EnterUninterruptibly(mon, out wasInterrupted);
try
{
counter += units;
grantAllAvailable();
}
finally
{
Monitor.Exit(mon);
if (wasInterrupted)
{
Thread.CurrentThread.Interrupt();
}
}
}
public void Set()
{
signaled = true;
Interlocked.MemoryBarrier();
if (waiters != 0)
{
SyncUtils.EnterUninterruptibly(mon, out bool wasInterrupted);
setVersion += 1;
try
{
Monitor.PulseAll(mon);
}
finally
{
Monitor.Exit(mon);
if (wasInterrupted)
{
Thread.CurrentThread.Interrupt();
}
}
}
}
